package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish>implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private DishService dishService;

    //新增菜品
    @Override
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品信息到dish表中
        this.save(dishDto);
        // 菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    //批量删除
    @Override
    @Transactional
    public void removeWithFlavor(List<Long> ids) {
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Dish::getStatus,1);
        //查询菜品的id和传过来的菜品id值
        queryWrapper.eq(Dish::getId,ids);
        int count = this.count(queryWrapper);
        if (count>0) {
            throw new CustomException("菜品已起售");
        }
        this.removeByIds(ids);
        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(DishFlavor::getDishId,ids);
        dishFlavorService.remove(lambdaQueryWrapper);
        }

    //根据id查询菜品信息和对应的口味信息
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();
        //复制
        BeanUtils.copyProperties(dish,dishDto);
        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,id);
        List<DishFlavor> list = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(list);
        return dishDto;
    }

    //批量起/停售
    @Override
    public void updateStatus(Integer status, List<Long> ids) {
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId,ids);
        List<Dish> dishList = dishService.list(queryWrapper);
        dishList=dishList.stream().map((item)->{
            item.setStatus(status);
            return item;
        }).collect(Collectors.toList());
        dishService.updateBatchById(dishList);
    }


    //修改菜品
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors=flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }

}





